Road machine



March 1, 1938.

ROAD MACHINE Filed April 21, 1952 7 Sheets-Sheet l INVENTOR. Carl 0.Gu57'0f50/7 c. A. GUSTAFSONQ 1 3" March 1, 1938. c. A. GUSTAFS'ON ROADMACHINE Filed April 21, 1932 .7 sh ets-sheet 2 NWN QWN

A TTORNE).

' INIQENTOR (qrl l7. fius T075500 March 1', 1938.

C. A. GUSTAFSON ROAD MACHINE 7 Sheets-Sheet 3 Filed April 21, 1952INVENTOR. Carl )7. ausTafson BY ATTORNEY 7 Sheets-Sheet 4 March 1, 1938-c. A. GUSTAFSON ROAD MACHINE i Filed A ril 21, .1932

a 36 Q a f N TTORNM March 1, 1938.

c. A. GU STAFSON ROAD MACHINE Filed April v 21, 1932 Ill!TIIIIIIIIIIIIIIII 0111111 4? u h-E "'INKENTOR. Carl- 9. Gus 7 /3 7Sheets-Sheet 6 March I, 1938. c. A. GUSTAFSON ROAD MACHINE 7 Shets-Sheet7 Filed April 21, l932 INVEN TOR. [4H 6. Gus 76/5017 B Y A TTORIQ;

Patented Mar. 1 1938 UNITED STATES,

ROAD MACHINE Carl A. Gustafson, Minneapolis, Minn., assignor toCaterpillar Tractor 00., San Leandro, Calif., a. corporation ofCalifornia.

Application April 21, 1932, Serial No. 606,643

24 Claims.

INTRODUCTION Ihis invention relates to graders, and more particularly tograders having elevating carriers. Machines of this type are adapted foruse in earth moving jobs such as filling dump wagons, excavatingditches, casting in road grades directly from the ditch to the grade,building levees,

etc., and such machines comprise generally a supporting frame in whichis mounted a plow and an elevating carrier for elevating and dischargingearth which is cast thereupon by the plow. It is necessary in such workthat the carrier be raised or lowered to change the delivery of theearth to the wagon or to the grade and to provide proper delivery of theearth thereupon from the plow. In such machines the plow must also beadjusted to vary its cutting angle and to change the depth of the cut.

1e grader is usually drawn by a tractor and in order to keep the graderin constant eficient operation as the train moves steadily along theattendant stationed on the grader must be able to adjust quickly thepositions of the plow and 5 the carrier and to control the power driveof the carrier. In short, the efiiciency of the grader as anearth-handling machine depends largely on the speed and precision of thecontrols for the working mechanism. For example, it is often 39,desirable that the adjustments of the plow and the carrier be madesimultaneously, or that both ends of the carrier be adjusted at the sametime. Such simultaneous adjustment is not possible with the handoperated controls found in machines heretofore known, due to the factthat the heavy plow frame and the heavy carrier cannot be adjusted withease, and also to the fact that such hand controls are so separated asto preclude simultaneous operation thereof. In 4,0 such known machinesmost of the operators attention is required for the efiort of making theadjustment rather than observation of the part being adjusted toascertain when it has reached the proper positon. Hand operated controlsalso 45 have the disadvantage of making any adjustment slow and in theincreased effort required from the operator for adjustment duringoperation of the machine.

The present invention overcomes these disad- 50 vantages by providingpower operated control whereby a quick and positive adjustment of theplow and the carrier is assured, the operator is relieved of the Workrequired to make the ad justment so that his attention can be directed55 to securing proper adjustment of the plow and of the carrier, andadjustments can ,be made simultaneously and without stopping thecarrier.

In the present invention the power unit is installed on the grader,thereby giving the operator control of the speed of the carrier belt andthe. speed with which adjustments are made. While this feature isadvantageous, it is not necessary as the power controls and thecarriercan be operated by a power take-off from the traction vehicle.

Another disadvantage present in elevating. carriers heretofore known isthat in handling loose, bulky or slippery material the carrier could notbe raised to as steep an angle as is sometimes desirable, due to theback-slipping of the material which is being elevated, which alsolimited the capacity of the machine. These disadvantages areeliminatedin the machine embodying the instant invention by providing a carrierbelt which prevents slippage of material with respect thereto.

Another advantage present in applicants improved elevating grader isthat the belt adjusting mechanism is easy to operate, is capable oi,operation while the carrier belt is elevating material, and provides afiner adjustment for varying the tension on the belt.

STATEMENT or INVENTION It is an object of the invention to providemachine controls in an elevating grader which are positive in theiroperation and which respond quickly to manipulation thereof.

Another object of the invention is the provision of power operatedcontrol means for elevating graders.

Another object of the invention is to provide controls for poweroperated adjusting means in an elevating grader which are grouped nearthe operators station. I

Another object of the invention is the provision of power operatedcontrol means for ad justing an adjustable elevating carrier.

Another object of the invention is the provision of manually operablecontrol meansfor connecting carrier adjusting means to a source ofpower. 7 -'Another object of the invention is the provision of manuallyoperable control'means 0perable by a single manual stroke to connect aplurality of carrier adjusting means to a source of power. v

Another object of the invention is the provision of power operated meansfor adjusting a plow.

Another object of the invention is the "provision of manually operatedmeans for connecting plow adjusting means to a source of power.

Another object of the invention is the provision of power operated meansfor adjusting a plow and means for varying the effect of said adjustingmeans.

Another object of the invention is to provide an improved carrier beltfor elevating graders.

Another object of the invention is to provide means for preventingslippage of the material carried by a conveyer belt.

Another object of the invention is the provision of improved means foradjusting the tension on an endless carrier belt which is capable ofoperation while the carrier belt is in use and which is easy to adjust.

Other objects will appear as the description of the machine progresses.

DESCRIPTION or FIGURES Fig. 1 is a left side elevation of the graderwith certain parts broken away.

Fig. 2 is a rear elevation of the grader with certain parts broken away.

Fig. 3 is a plan view of the grader with certain parts broken away.

Fig. 4 is a plan view of a portion of the carrier belt showing the beltsplice.

Fig. 5 is a perspective view of a portion of the carrier belt.

Fig. 6 is a section taken on the line 6-6 in Fig. 4.

Fig. '7 is a section taken on the line 'I-'I in Fi 4.

Fig. 8 (sheet 2) is an enlarged partial front view of the upper carriershowing a portion of the carrier belt tightening means.

Fig. 9 is an enlarged section through the flywheel clutch assembly.

Fig. 10 is an enlarged vertical section through the control gear box.

Fig. 11 is an enlarged vertical section showing a portion of the drivetransmitting train for the control gear box.

Fig. 12 is a view taken on the line I 2I2 in Fig. 11.

Fig. 13 is a view taken on the line I 3-l3 in Fi 10.

Fig. 14 is a vertical section through the auxiliary plow control gearbox.

Fig. 15 is a detail View of certain drivetransmitting assemblies.

DESCRIPTION or MACHINE Frame (Series 1 to 99 reference numerals) Theframe of the machine comprises a longitudinal channel I, forming theleft side frame member as viewed from the rear of the machine (Figs.1-3), channels 2 and 3, forming in part the right side frame member,front cross channel 4 secured to the front ends of channels I and 2, andrear cross channel 5 secured to the rear ends of channels I and 3. Theinner ends of channels 2 and 3 are rigidly connected in a manner to behereinafter described. Central cross channels 0 (Fig. 1) and 'I (Fig. 2)are connected at their left ends to longitudinal channel Iand at theirright ends to the inner ends of channels 2 and 3, respectively.

The front end of the frame is supported by forward extensions 8 (Figs. 1and 3) which are secured to channels 4 and 6 and bent downwardly and 3.The left rear end of the frame is provided with angle I I, secured atits upper end tochannels I and 5, and at its lower end to cross angleI2. A similar upright angle (not shown) is provided at the junction ofchannels 3 and 5. Cross angle I2 is secured to the rear wheel and axleassembly I3 indicated generally in Figs. 1-3. No detailed description ofthe wheel and axle assemblies will be given herein as they form no partof the instant invention.

The frame is braced by four diagonal angles I 4 having their outer endssecured to the side frame channels, their inner ends gusseted to gether,and being secured intermediate their ends to forward extensions 8 andcross channels 6 and I.

Upright angles 2| (Figs. 2 and 3) are secured to the inner ends ofchannels 2 and 3, and channel 22 secured to said angles serves tocomplete the right longitudinal frame member of the machine.

A pair of upright angles 26, forming posts, are secured to channels 2and 22 and channels 3 and 22, respectively, and said posts'serve tosupport certain adjusting mechanisms which are described hereinafter.Inclined angles 21 are secured at their upper ends to posts 26 and attheir lower ends to cross channels 6 and 'I, respectively, by suitablebrackets. Suitable bracing members are provided to support said angles21 intermediate their lengths.

Horizontal angle 3I (Figs. 2 and 3) is secured at its right end to rearangle 21, and is supported intermediate its ends by post 32 rising fromside channel I (Figs. 1 and 2). Gusset 33 serves to brace post 32 andangle 3|. The outer end of angle 3! is secured to longitudinal angle 34which is supported at its forward end by angle 31 which is supported bypost 36 secured to channels I and 4. Bent angle 31 (Figs. 1 and 3) issecured at its lower end to channel 4 and forms a support for a portionof theplow adjusting mechanism as described hereinafter. Angle 34 issupported intermediate its ends by post 38 (Fig. 1).

A pair of inclined angles 0| (Fig. 2) are secured at their upper ends tochannel I and channels 6 and I, respectively, and near their lower endsto posts 26. A pair of inclined angles 42 are secured at their lowerends to the respective ends of angles 4| and at their upper ends toposts 26 as shown in Fig. 2. Said angles 42 serve as guides for thecarrier center lifting mechanism as described hereinafter.

Motor 6I (Figs. 1-3) is supported near its ends by cross channels 4 and6 and near its center by angle 68 secured to channels I and 2. Saidmotor BI may be of any conventional type. The throttle control for motor6| comprises rod 63 (Figs. 1 and 3) attached to control handle 64 (Figs.1-3), the adjustment of which is maintained by a pawl having operatinghandle 66 and engaging fixed ratchet 61.

Platform 52, secured tochannels I and 3 at the rear of the machine,provides an operators station from which operation of the grader iscontrolled, as is more fully described hereinafter.

Plow assembly (Series 100 to 199 reference numerals) The plow framecomprises channel IOI (Figs. 1-3) which carries plow I26 in a manner tobe hereinafter described, and is adjustably supported from the frame ofthe grader. Channel IN is provided with strap I02 at its forward end towhich clevis I03 carrying sheave I04 is attached by hanger and springassembly I 06. Chain I07 fixed at one end to angle 34 runs over sheaveI04 and a sheave I08 secured to bent angle 31 (Figs. 1 and 3) and theother end of said chain is secured. to shaft 441 to be more fullydescribed hereinafter.

The rear end of channel IN is held between yoke III and clamp II2, whichare bolted to each other and to channel IOI (Figs. 1 and 2). Clamp I I2is supported by hanger and spring assembly II3 from clevis II4 carryingsheave II6. Chain H1 secured at one end to angle'34 passes over sheaveH6, and is secured at its other end to shaft 453.

From the foregoing description it is seen that,

plow frame channel IN is adjustably supported at its front and rear endsso that it may be raised or lowered bodily with respect to the ground orits inclination may be changed with respect thereto by selectiverotation of shafts 441 and Plow I26 is mounted oh plow standard I21which is secured to channel IOI by clamp I28, being braced with respectthereto by brace I29 (Fig. 1).

A draft connection is provided from front wheel and axle assembly I0 tochannel IM and plow I26. Angles I36 (Figs. 1 and 3) are-secured tochannel IOI intermediate its ends and journaled in said angles is apivot I31 (Fig.- l) on which I-beam I38, (Figs. 2 and 3), comprising aplow drawbar, is pivoted, said I-beam I38 being releasably secured tothe grader frame at its other end. Adjustable connection I42 serves tohold I-beam I38 in the proper angular relation with channel IOI. ChainI39 (Figs. 1 and 3) is secured to the front axle and to clevis I M whichis pivoted to I-beam I38, thereby providing a draft connection from thefront axle to the plow frame.

The rear end of channel IOI, is adjustable with respect to the line ofdraft by means of bar I43 (Fig. 2) secured at one end to clamp H2 and atthe other end to a frame member (not shown).

Carrier assembly (Series .200 to 299 reference numerals) 1 Carrier 20Icomprises upper carrier or section 202 and lower carrier or section 203pivotally joined at 204; each of said sections is provided withsideboards 206 to guide the material being elevated, said sideboards 206being supported by brackets 201 from side frame members 208 conover saidsheaves 2I8, and sheaves 22I looselymounted on shaft 222 which is'securedto inclined angles 21. Said chains 2 I 9 have their other endssecured to shaft 423, which is rotated in a manner hereinafter describedto wind or unwind said chains 2 I 9, thereby raising or lowering uppercarrier or section 202.

, Means are provided for adjusting lower car-- rier or section 203 tovary the position of said section with respect to the ground and to varythe inclination at which material is elevated. A pair of chains 23'I(Figs. 1 and 3) have -their lower ends secured to side members 208 oflower section 203 and passover idler sheaves 232 loosely mounted onshaft 233, said shaft being supported by cross channels 6 and 1. Saidchains 23I havetheir upper ends secured to shaft 431 suitablysupportedon inclined angles 21 as described hereinafter. Shaft 431 isrotated by means to be described hereinafter to wind or unwind chains23I,-

thereby raising or lowering section 203.

Means are provided for adjusting the carrier.

pinions 241 fast on shaft 248, suitablyjournaled Shaft .248 is providedat its rear end with gear-249 (Figs. 2-

in bearings mounted on posts 26.

and 3) which meshes with pinion 25I integra1 with hand-wheel 252slidably and rotatably mounted on transverse shaft 253, also journaledin suitable bearings on posts 26 and 2|, Upon rotation of shaft 248 byhand-wheel 252, bars 24I are raised or lowered, thereby adjusting saidcarrier center. Ratchet wheel 254 (Fig. 3) cooperates with a suitablepawl (not shown) to maintain the adjustment of the carrier center in awell-known manner.

Means are provided for driving an endless carrier belt hereinafterdescribed so that material cast thereon by plow I26 at the lower end ofthe carrier will be elevated and discharged at the upper end thereof.Shaft 26I (Figs. 2 and 3) adjustably mounted in frame members 208 ofupper section 202 carries drum 262'wnich drives said carrier belt.Roller 263 (Fig. 2) is journaled in the lower ends of said frame members208 of lower section 203, and intermediate drum 26-2 and roller 263 aplurality of idler rollers 264 are provided to support the upper stretchof said carrier belt. Drum 262 and shaft 26I are driven by chain 261(indicated diagrammatically in Figs. 1-3) which engages sprocket wheel266 fast on shaft 26L Said chain 291 passes over idler sprockets268 andengages and is driven by sprocket wheel 269 fast on shaft 2" (Fig. 2)journaled in-a suitable housing mounted on a frame bracket. Sprocketwheel 213 also fast on shaft 21I, is engaged and driven by chain 214(also indicated diagrammatically) which engages sprocket wheel 216 faston shaft 329. Said shaft 329 andthe drive therefor from motor 6I aremore specifically described hereinafter.

As pointed out hereinbefore, inclined carriers of the type provided inelevating graders are limited in capacity by the character of materialbeing elevated, loose, bulky or slippery material being inclined to slipback. Thus, not only is the angle of inclination of the carrier limitedbut theentire capacity of the grader is limited when any slippage of thematerial occurs. In applicant's improved elevating grader thesedifficulties are overcome and the. permissible angle of inclina tionofthe carrier is increased for all types of material conveyed, and thecapacity ofthe machine as a whole is increased by the provision of a newand advantageous belt construction which is par ticularly adapted foruse in elevating graders.

Belt "286 (Figs. 4-7) comprises an underlayer 28I (Figs. S and 6) ofrubber, a relatively thick intermediate layer 282 consisting of aplurality of sheets of fabric andrubber, and an upper layer 283 ofrubber in which transverse corrugations are integrally formed by meansof a die. The

Bars 24I are above described layers are vulcanized together to form arelatively thick laminated belt. The ends of said belt 280 are splicedtogetherby means of hinges 284secured to the ends of said belt by bolts285.

Means are provided for adjusting the carrier belt whereby the tensionthereon may be varied at any time by the operator. Shaft 26| whichcarries drum 262 is journaled in bearings 286 (Figs. 3 and 8) mountedon. a pair'of slides 281 (Figs. 2, 3 and 8) which are supported onrespective side frame members 208 of upper-section 202 by guides 288bolted to said frame members. Each slide 281 is provided at its outerend with bracket 289 having bearing 290 in which one end of roller 29|is journaled, the other end thereof being journaled in similar bearing230 secured to slide 281 near the inner end thereof. Rollers 29| braceslides 281 and also serve to support carrier 20| when said carrier islowered against a wagon.

Each slide 281 is provided at its inner end with boss 292 which isengaged by the nut on bolt 293. Chain 294- secured to bolt 293 at oneend is fastened at its other end to cam 295 fast on shaft 296. Rotationof shaft 296 in a clockwise direction as Viewed in Fig. 8 winds chains294 about cams 295 thereby pulling slides 28'! forwardly carrying drum262 therewith whereby the tension on belt 280 is increased.

Means are provided to rotate shaft 296 to tighten or loosen belt 280 byadjusting the tension thereon. Chain 291 is fastened at one end tosheave 298 (Fig. 8) on shaft 296 and passes over idler sheave 299mounted on forward post 26, having its other end secured to shaft 253(Fig. 3) Shaft 253 is provided at its rear end with clutch element 255which is adapted to engage a complementary clutch element on handwheel252 when said wheel is shifted rearwardly on shaft 253. Turning ofhand-wheel 252 in its rearward position serves towind or unwind chain291 about shaft 253 whereby chains 294 are wound or unwound about cams295 to tighten or loosen carrier belt 286. It will be recalled thathand-wheel 252 also controls the carriercenter lift.

This type of belt tightening apparatus is particularly advantageous inthat only a minimum portion of the carrier assembly need be'movecl tomake the adjustment, thereby securing easy operation, and in that theadjustment may be readily made while the carrier belt is in use. Theconstruction thereof is also substantially simplified over known formsof belt tighteners.

Power control (Series 300 to 499 reference numerals) and is provided atits outer end with a fingeredaperture adapted to receive bolt 309 whichpasses through an aperture in plate 301 and i's'pivoted to plate 3|Spring 310 surrounding bolt 309 tends to hold lever 308 in the positionshown in Fig. 9. Three levers 308 are provided but only one ofsaid'levers is illustrated in Fig. 9. Plate 3 is being held therein bythe end of lever 306.

(Fig. 9) of motor 6| is seprovided with teeth which mesh with internalteeth formed on flange 306 of flywheel 302, whereby said plate 3|rotates with said flywheel 302 but is shiftable with respect thereto. Aplurality of compression springs 3|2 are provided which press plate 3towards said flywheel 302; said springs 3|2 are seated in plate 301 andengage projections on plate 3| Only one of said springs is shown in Fig.9.

Plate 3|6 riveted to hub 3|1 splined on tubular shaft 3|0 is providedwith clutch faces 3|9 of suitable composition, said faces 3|9 beingadapted to be engaged by the respective clutching faces of flywheel 302and plate 3.

From the foregoing description, it is seen that when lever 308 is in theposition shown in Fig. 9, springs 3| 2 press plate 3 inwardly wherebyclutch faces 3| 9 on plate 3|6 are gripped between the respectiveclutching faces of flywheel 302 and plate 3H, transmitting the drivetherefrom to hub 3|1 and tubular shaft 3|8, said shaft 3|8 beingsupported by bearing 32| in flywheel 302 and by bearing 322 in housing325.

Gear 323 keyed on tubular shaft 3|8 meshes with gear 324 keyed on stubshaft 326, said shaft 326 being supported in housing 325 by bearings321' and 328. Shaft 329, the drive shaft for the carrier belt drive, isdriven from shaft 326 through releasable connection 33I.

It is seen, therefore, that the drive for the carrier belt is controlledby movement of plate 3 as determined by movement of levers 308. Theinner ends of levers 398 (Fig. 9) are bent and bear against the face ofring 336 surrounding tubular shaft 3|8 but not engaged therewith. Ring336 is mounted in cage 331 by bearing 338, Cage 331 is resiliently heldagainst the wall of housing 325 by compression springs 34| held betweenflange 342 of said cage 331 and washers on the end of bolts 343, whichpass freely through said flange and have threaded engagement with thewall of housing 325. Cage 331 when moved forwarclly presses ring 336against the inner ends of levers 308 whereby said levers are rocked tomove plate 3 to the right as viewed in Fig. 9, thereby interrupting thedrive for the carrier belt.

Movement of cage 331 is controlled by a pair of arms 346 on shaft 341,and engaging the shoulder on said cage 331v Only one of said arms 346 isseen in Fig. 9. Shaft 341 is journaled in housing 325 and extendstherethrough to the right as viewed from the rear of the grader, and arm348 (Fig. 1) secured thereon is connected by rod 349 with a crank onshaft 352 (Figs. 1 and 3) carrrying clutch control lever 359.

From the foregoing description it is seen that the operator can controlthe drive for the carrier universal connection 359; said shaft 358enters, the base of housing 36| supported by bracket 362 on channell(Figs. 1 and 2). Shaft 358 carries worm-363 (Figs. 11 and 12) whichengages worm wheel 364 (Fig. 12) fast on vertical shaft 366.

Bevel gear 361 keyed to shaft 366 at its upper end within gear boxhousing 368, meshes with bevel gears 3H and 312, rotatably mounted onshaft 313, journaled in housing 368. Thus it is seen that bevel gears311-312 are rotated in opposite directionsuponrotation of shaft 366 andgear 361. Hubs 314 and 316 of gears 311 and 312, respectively, areformed with clutch teeth adapted to be engaged by complementary clutchteeth on double faced clutch element 311 which'engages splined portion318 of shaft 313.

Clutch element 311 is provided with a peripheral groove engaged by fork319 secured to rod 381 slidably mounted in housing 368. Rod 381 isprovided at its front end with a notch '382 which is engaged by springpressed 'ball 383 when said shaft is in its central position, whereinclutch element 311 is disengaged from both gears 311 and 312. Rod 381 ispivoted at its rear end to control lever 384 (Fig. 10), said controllever being conveniently pivoted in housing 368.

Spur gear 386 (Fig. 13) integral with bevel gear 311 meshes with spurgear 381 rotatable on shaft 388, and spur gear 389 rotatable on shaft390. Spur gear 391 integral with bevel gear 312 meshes with spur gear392 on shaft 388 and spur gear 393 on shaft 390.

Spur gears 381 and 392 on shaft 388 are provided with clutch teethadapted to cooperate with double faced clutch element 394 slidable onsplined portion 396 of shaft 388, and controlled by lever 391 (Figs. 2and 3) identical in construction with control lever 384.

Spur gears 389 and 393 on shaft 390 are similarly provided with hubs401402 formed with clutch teeth adapted to cooperate with complementaryclutch teeth on double faced clutch element 403 slidably engaged withsplined portion 404 of shaft 390, said clutch element 403 beingcontrolled by lever 406 (Figs. 2 and 3), identical in construction withlevers 384 and 391.

From the foregoing description it is seen that control lever 391 uponforward or rearward movement selectively'controls rotation of shaft 388in either direction. Similarly, lever 384 determines rotation of shaft313 selectively in either direction, and lever 406 similarly controlsshaft 390.

Shaft 388 is connected 'to shaft 411 (Fig. 3) by universal connection412 and said shaft 411 is connected by universal connection 413 to shaft414 journaled in housing 416, mounted on in-' clined angle 21. Shaft 414(Fig. 15) carries bevel pinion 411 meshing with bevel gear 418 on shaft419 also journaled in housing 416. Shaft 419 carries worm 421 engagingworm wheel 422 on shaft 423 (Figs. 3 and 15) said shaft 423 beingjournaled at its ends in housing 416 and in bearing 424 mounted onrespective inclined angles 21. As described hereinbefore, chains 219wind and unwind about shaft 423 to control raising and lowering of uppercarrier or section 202. It is seen, therefore, that movement of controllever 391 controls the adjustment of said upper carrier. It is to benoted that worm 421 and worm wheel 422 transmit the adjusting drive andalso serve to maintain the adjustment of upper section 202 in that wormwheel 422 is driven by worm 421 but cannot drive said worm.

Shaft 313 is connected by universal connection 431 to shaft 432 which isconnected at its other end by universal connection 433 to shaft 434journaled in housing 436 mounted on inclined angle 21. Said housing 436encases a drive assembly identical in construction with that containedin housing 416 heretofore described and illustrated in Fig. 15. Saiddrive assembly drives shaft 431 to which chains 231 for adjusting lowercarrier 203 are secured. It isseen, therefore,

that'forward or rearward movement of control lever 384 determinesraisingor lowering of 'said lower carrier 203. T. V i

Shaft 390, controlled by'lever 406, is connected by spider connection441 with shaft 442 journaled in housing 443 (Fig. 14) mounted on angle34 (Fig. 1). Worm 4'44 keyed on shaft 442 engages worm wheel 446 fast onshaft 441 journaled in said housing 443. Said shaft 441 extends throughsaid housing 443 to the left as viewed from the rear of the grader andchain 101 for adjusting the front end of plow channel 101 is secured tosaid shaft 441. I 1

Worm 451 (Fig. 14) rotatably' mounted on shaft 442 engages'wormwheel'452 fast on shaft 453 journaled in'said housing 443 andextendingtherethro'ugh" parallel to said shaft 441. Chain 111 for adjusting therear end of plow channel 101 is secured to shaft 453. Worm 451' isprovided at its front'end with clutch teeth 456 adapted to be engaged bycomplementary clutch teeth 451 on 'clut'ch element 458 slidable onsplined portion 459 of shaft 442. Clutch element 458 is provided withperipheral groove461 jwhich receives pins 462 on a pair ofintegral arms463 secured to shaft 464 journaledin' 'said housin 443. Only one of saidarms 463 is illustrated in Fig. 14. Control lever 465 is secured onshaft 464 outside of housing 443. g a

Fromthe foregoing description it is seen that with control lever 465 inits rearward position, manipulation of the control lever 406 determinesraising or lowering of both ends of plow channel .101 whereby the depthof cut of plow 126 maybe varied, or said plow 126 may be disengaged fromthe earth. If said control lever 465 is moved to its forward position,the drive for shaft 453 is interrupted whereby, upon'manipulation oflever 406, only the front end of'plo'w channe1 101 is raised or lowered.In this manner theangle of inclination of plow 126 with respectjtotheearth may be varied. I

- In the foregoing description a plurality of new and advantageousfeatures have been described, all of which contribute to easier andmoreefficient operation of the grader. The power operated controls. enablethe operator toadjust readily and simultaneously the positions of theplow and the 'carrienwhereby no delay-is en' countered during operationand the grader is at all times adjusted properly for the'most efficientoperation. The belt tightening mechanism described herein provides aneasier and more sensitive adjustment of the tension on the belt wherebysaid belt is always operating 'at the proper tension. Moreover thecontrols for the abovementioned adjusting mechanisms as well as thethrottle and clutch controls, are allconveniently located at theoperators station so that the operator is in constant command of thegrader. The new carrier belt constructiondisclosed herein contributes tomore efficient operation of the grader by preventing back-slipping ofthe material being elevated whereby a' greater quantity of material isdelivered and the permissible inclination of the carrier is increased-While my invention has been described "with reference to the preferredembodiment thereof, it is to be understood that my invention i "notlimited by the Specific construction of such embodiment, but is limitedonly by the scope of the appended claims. I

I, therefore, claim as my invention:

1. In an elevating grader, a frame; a carrier having a belt and adriving train-therefon 'aset' rier to a shaft mounted on said frame, asecond set of chains connecting the lower end of said carrier to asecond shaft mounted on said frame, a plow, a set of chains connectingsaid plow to third and fourth shafts mounted on said frame, a powerdriven shaft, a clutch connecting said power driven shaft and saiddriving train, a fifth shaft driven by said power driven shaft, a gearbox comprising sets of oppositely disposed intermeshing gears driven bysaid fifth shaft and having clutch teeth, each opposite pair of gearsbeing rotatably mounted on a stub shaft journaled in said box and havinga central splined portion, a double faced clutch element slidabie onsaid splined portion and having driving engagement therewith, a controllever associated with each clutch element adapted to shift said clutchelement into clutching engagement with either gear of the associatedpair, a driving connection from one said stub shaft to said first shaft,a second driving connection from a second said stub shaft to said secondshaft, and a third driving connection from a third said stub shaft tosaid third and fourth shafts.

2. In an elevating grader, a frame, acarrier having a belt and a drivingtrain therefor, a set of chains connecting the upper end of said carrierto a shaft mounted on said frame, a second set of chains connecting thelower end of said carrier to a second shaft mounted on said frame, aplow, a set of chains connecting said plow to third and fourth shaftsmounted on said frame, a power driven shaft, a clutch connecting saidpower driven shaft and said driving train, a fifth shaft driven by saidpower driven shaft, a gear box comprising sets of oppositely disposedintermeshing gears driven from said fifth shaft and having clutch teeth,each opposite pair of gears being rotatably mounted on a" stub shaftjournaled in said box and having a central splined portion, a doublefaced clutch element slidable on said splined portion and having drivingengagement therewith, a control lever associated with each clutchelement adapted to shift said clutch element into clutching engagementwith either gear of the associated pair, a driving connection from onesaid stub shaft to said first shaft, a second driving connection from asecond said stub shaft to said second shaft, and a third drivingconnection from a third said stubshaft to said third and fourth shafts,including a gear assembly providing a constant connection to said thirdshaft and a controllable clutch connection to said fourth shaft. F s w3. In a machine of the class described, an adjustable tool, a pluralityof adjusting means for said tool, means for actuating all of saidadjusting means simultaneously including a reversible master clutchoperable to establish a power drive to actuate said adjusting means ineither one of opposite directions, and a secondary clutch for disablingat least one of said adjusting means.

4. In a machine of the class described, an adjustable tool, a pluralityof adjusting means connected to said tool at spaced points, a reversibledrive adapted to actuate all of said adjusting means simultaneously ineither one of opposite directions, and a clutch mechanism for disablingat least one of said adjusting means.

5. In a machine of the class described, an adjustable tool, a pluralityof adjusting means connected to said toolat spaced points, a reversibledrive adapted to actuate all of said adjusting means simultaneously ineither one of opposite vof chains connecting the upper end of saidcardirections, means including a single control lever for disabling allof said adjusting means simultaneously, and additional means fordisabling at least one of said adjusting means independent of said firstmentioned disabling means.

6. In an elevating grader, an adjustable plow frame, a source of power,a plurality of adjusting means connected to said plow frame at spacedpoints, means for positively actuating all of said adjusting meanssimultaneously from said source of power to efiect raising or loweringof the entire plow frame uniformly with respect to the ground, and aclutch mechanism for disabling at least one of said adjusting means whenit is desired to adjust the angle of the plow frame with respect to theground.

7. In a device of the class described, a plurality of drive shafts,adjusting means operated by rotation of each drive shaft, a controlshaft, constantly meshing gears between said control shaft and one ofsaid drive shafts, a gear journaled about said control shaft, a gearmeshing therewith and on another of said drive shafts, means for drivingsaid control shaft, and means for optionally effecting drivingconnection between said latter two gears.

8. In a device of the class described, a plurality of drive shafts,adjusting means operated by rotation of each drive shaft, acontrol'shaft, constantly meshing gears between said control shaft andone of said drive shafts, a gear journaled about said control shaft, agear meshing therewith and on another of said drive shafts, means fordriving said control shaft, and means including a clutch elementslidably mounted on said control shaft for optionally effecting drivingconnection between said latter. two gears.

9. In an elevating grader, 'a frame, a carrier adjustably mounted onsaid frame, self-locking means for adjusting one end of said carrier,self-' locking means for adjusting the other end of said carrier, asource of power, and selectively oper able means including independentreversible driving connections to each of said adjusting means forconnecting said adjusting means to said source ofpower. I

10. In an elevating grader, a carrier compris ing an upper section and alower section, a power driven shaft, means including a self-lockingconnection adapted to be' driven by said shaft for adjusting said uppersection, means including a self-locking connection adapted to be drivenby said shaft for adjusting said lower section,'and means includingcontrol members and. an independent reversible driving connection toeach of said adjusting means and operable by a control member forenabling the drive for said upper section and said lower sectionadjusting means.

11. In an elevating grader, a power driven carrier belt, a source ofpower, means for driving said carrier belt from said source of powerincluding a rotatable shaft and'clutching mechanism interposed betweensaid source of power and said rotatable shaft, power operated means foradjusting the position of said carrier belt, other adjusting means foradjusting the position of mechanism other than said. carrier belt, andmeans for controlling the operation of all of said aforementionedadjusting means, including a second shaft connected forconstant'rotation with said source of power and a unitary, selectiveclutch mechanism interposed between said constantly rotatable secondshaft and said adjusting means.

12. In an elevating grader, a power driven carrier belt, a source ofpower, means for driving said carrier belt from said source of powerincluding a rotatable shaft and clutching mechanism interposed betweensaid source of power and said rotatable shaft, power operated means foradjusting the position of said carrier belt, other adjusting means foradjusting the position of mechanism other "than said carrier belt, meansfor controlling the operation of all of said aforementioned adjustingmeans, including a second shaft connected for constant rotation-withsaid source of power and a unitary, selective clutch mechanisminterposed between said constantly rotatable second shaft and saidadjusting means, and an operators station, said unitary, selectiveclutch mechanism being positioned adjacent said operators station.

13. In an elevating grader, a power driven carrier belt, a source ofpower, means for driving said carrier belt from said source of powerincluding a rotatable shaft and clutching mechanism interposed betweensaid source of power and said rotatable shaft, power operated means forconstant rotation with said source of power and a unitary, selectiveclutch mechanism interposed between said constantly rotatable secondshaft and said adjusting means, an operators station, said unitary,selective clutchmechanism being positioned adjacent said operatorsstation, said first-mentioned clutching mechanism being positionedremote from said operators station and adjacent said source of power,and a control lever operatively connected to said clutching mechanismadjacent said source of power and positioned adjacent said operatorsstation.

14. In an elevating grader, a source of power, power operated movablemechanism adapted for substantially constant operation, power operatedadjusting mechanism adapted for non-constant operation, means foroperating said movable mechanism including a shaft and clutching meansinterposed between said shaft and said source of power, and means foroperating said adjusting mechanism, including a second shaft connectedfor constant rotation with said source of power and clutching mechanisminterposed between said second shaft and said adjusting mechanism.

15. In a machine of the class described, an adjustable device, aplurality of adjusting means connected to said device, a source ofpower, means for connecting said adjusting means to said source ofpower, reversible clutching means operable to establish a power drive toactuate said adjusting means in either one of opposite directions forconnecting or disconnecting all of said adjusting means simultaneously,and means interposed between said clutching means and said adjustingmeans for effecting adjustment of one of said adjusting means alone.

16. In an elevating grader, a plow frame, adjusting means connected toone end of said plow frame, adjusting means connected to an opposite endof said plow frame, a source of power, means for connecting all of saidadjusting means to said source of power, clutching means for connectingor disconnecting all of said adjusting means simultaneously, and meansfor effecting adjustment of one of said adjusting means alone.

17. In an elevating grader; a power driven conveyor; a source of power;means for driving said conveyor from said source of power, including arotatable shaft, and a releasable connection interposed between saidsource of power and said rotatable shaft; power operated means foradjusting the position of said conveyor; and means for controlling theoperation of said adjusting erating saidadjusting means in oppositedirections, and a second shaft interposed between said control boxandsaid source of power, whereby a constantly available drive isprovidedfcr said tioninterposedibetween said source of power and saidrotatable shaft; power operated means for adjusting the position of saidconveyor; other adjusting means; and unitary selectively operable meansfor controlling the operation of all of said adjusting means,including acontrol box,

reversible drive establishing means in said control box and connected tosaid adjusting means for selectively operating said adjusting means inopposite directions, and a second shaft interposed between said controlbox and said source of power, whereby a constantly available drive isprovided for said drive establishing means irrespective of theconditioning of said releasable connection.

19. In an elevating grader; a plurality of ad-, justing mechanisms forearth working means; a source of power; and means for operating saidadjusting mechanisms together or individually including driving meansconnected with said source of power, and an independently operable andreversible driving connection between said driving means and each ofsaid adjusting mechanisms.

20. In an elevating grader; an adjustable carrier; an adjustable plow; asource of power; adjusting mechanism for said carrier; adjustingmechanism-for said plow; and means for operating said adjustingmechanisms together or individually including driving means connectedoperable and reversible self-locking driving connection interposedbetween said driving means and each of said adjusting mechanisms.

21. In an elevating grader; an adjustable carrier; an adjustable plow; asource of power; a plurality of adjusting mechanisms for said carrier;adjusting mechanism for said plow; and means for selectively operatingsaid adjusting mechanisms including driving means connected with saidsource of power, and a driving connection from said driving means toeach of said adjusting mechanisms, each of said driving connectionsincluding independently operable reversible drive establishing meanswhereby any one of said adjusting mechanisms can be operated in eitherdirection independent of the other of said adjusting mechanisms and alsoincluding self-locking mechanism for automatically holding the adjustingmechanism in the different positions to which it may have been adjusted.l 22. In an elevating grader; an adjustable carrier; an adjustable plow;a source of power; adjusting mechanism for said carrier; adjustingmechanism for said plow; and means for selectively operating saidadjusting mechanisms including driving means connected with said sourcemechanism for said carrier; adjusting mechanism for said plow; a sourceof power for both said adjusting mechanisms and said carrier belt; meansincluding a releasable drive establishing connection for connecting saidsource of power to said belt to efiect driving of said belt; and meansfor selectively operating said adjusting mechanisms including drivingmeans connected with said source of power irrespective of whether thereleasable drive establishing connection to said belt is engaged ordisengaged, and a driving connection from said driving means to each ofsaid ad.- justing mechanisms, each of said driving connections includingindependently operable reversible drive establishing means whereby anyone of said adjusting mechanisms can be operated in either directionindependent of the other of said adjusting mechanisms and also includingself-locking mechanism for automatically holding the adjusting mechanismin the different positions to which it may have been adjusted.

24. In an elevating grader; a carrier having a belt; a plow; a source ofpower including an engine and a drive shaft extending from one end ofsaid engine; driving means connected to said belt adapted forsubstantially constant operation and having a releasable connection withsaid drive I shaft; adjusting means for said carrier; adjusting meansfor said plow; and means for operating said adjusting means including adriven shaft connected for rotation from said end of the engineirrespective of whether said releasable drive connection is engaged ordisengaged, an independently operable reversible driving connection toeach of said adjusting means interposed between said driven shaft andsaid adjusting means, and self-locking means for each of said adjustingmeans.

CARL A. GUSTAFSON.

